Finding the Fourth Proportional to 21,308.13, 29,404.42 and 12,356.01

Step by Step Solution

1. Step 1: Write the proportion equation
   21,308.13 : 29,404.42 = 12,356.01 : x
2. Step 2: Convert to fraction form
   21,308.13/29,404.42 = 12,356.01/x
3. Step 3: Cross multiply
   21,308.13x = 29,404.42 × 12,356.01
4. Step 4: Simplify right side
   21,308.13x = 363,321,276.67
5. Step 5: Solve for x
   x = 363,321,276.67/21,308.13
6. Step 6: Final answer
   x = 17,050.83